# SDR ABXA20260913404

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2026
- Submitted: September 15, 2026
- Operation: Air carrier
- Aircraft: [N362CM](https://openairdocs.org/aircraft/N362CM), registered now
- Make and model: Boeing 767338
- Aircraft serial: 24316
- Aircraft time: 118,515 hours, 35,375 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 79275515
- Part serial: 880139
- Condition: Defective
- Location: Zone 400
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260913404

## Discrepancy

WHILE CRUISING AT FL370 BETWEEN THE CALIFORNIA AND NEVADA BORDER, THE FO AND CAPT HEARD A BEEPING NOISE COMING FROM THE MAIN DECK CARGO AREA. ABOUT 30 SECONDS AFTER THAT THEY RECEIVED A MASTER WARNING EICAS CABIN ALTITUDE. AT THAT TIME THEY BOTH DONNED OXYGEN MASKS AND ESTABLISHED CREW COMMUNICATIONS & DECLARED AN EMERGENCY WITH ATC (EDC). THEY THEN AIR DIVERTED TO KLAS (DIV).  AFTER LANDING FIRE TRUCKS DID A VISUAL INSP ON THE EXTERIOR OF ACFT TO SEE IF THERE WAS ANY VISIBLE DAMAGE; WHICH THERE WASN’T & CONTINUED TO TAXI AND PARK. MTX GROUNDED AC , MTX TROUBLESHOT AND REMOVED AND REPLACED PRV CONTROLLER  IAW AMM 36-11-19.AND RH ENGINE PRSOV PRECAUTIONARY IAW AMM 36-11-09   OPS CHECK GOOD. ACFT REMAINS NO ETOPS

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